--Frank Regier, 50, professor of electrical engineering at American University, kidnaped Feb. 10, 1984, and freed by the Amal militia April 15, 1984. It was not known who held him, but they were believed to be radical Shias.

--The Rev. Benjamin Weir, 61, a Presbyterian minister who had worked in Lebanon since 1953, kidnaped by Islamic Jihad on May 8, 1984, and released Sept. 14, 1985.

At least two Americans have been killed in captivity:

--William Buckley, 57, of Medford, Mass., U.S. Embassy political officer, kidnaped March 16, 1984. Responsibility claimed by Islamic Jihad, which reported executing him Oct. 4, 1985, in revenge for alleged U.S. complicity in Israel's air raid on the Palestine Liberation Organization headquarters in Tunis. His body has never been found.

--Peter Kilburn, 61, of San Francisco. Librarian at the American University, he had been missing since Dec. 3, 1984. His body was found April 17, 1986.